I think it depends on where you want the Bedliner to end up. When I did mine I did bedliner onto the door sills to prevent scuffing the paint. In this case it would have been very hard to tape the bedliner and then paint and get a nice crisp line. SO I painted the exterior first then applied the bedliner (Monstaliner), see by build thread. Good luck!
1987 YJ, 258, Weber 32/36, HEI, Custom Sound bar, Hardtop/Sun-rider/bikini tops, 2" Lift, 1/2" Boomerangs, 1" Body & MM Lift. 32x11.5x15 Copper STT's on Black Rock 950 Lobos w/4" backspacing, Still need Front Bumper and Seats.
My build thread: [url]http://www.jeepforum.com/forum/f12/my-very-slow-87-yj-build-thread-1137667/[/url]